Acoustic apparatus.



E. RUBES.

v ACOUSTIC APPARATUS.

APPLICATION FILE-D SEPT. 26

Patented Dec. 31, 1912.

Lmwm' aslight' modi A r l V l M ERNEST RUIBES, O35 BROOKLYN. NE /V YORK.

ACOUSTIC APPARATUS.

Specification of Letters Patent. Application filed September 28, 1911.

Patented 3t, 1912. berial No. 651,389.

To allwhom it may concern:

Be it known that I, Ennnsr Runes, a citizen of the'Unit-ed States, residing at Brooklyn, in the count-y of Kings -and State of New York, have invented new and useful Acoustic Apparatus, of which the following is a specification.

as are used on automobiles, the like.

The primary object of the invention is to produce a signal or alarm of the type specitied that wil emitsounds of carrying power and to eliminate the rattling or metallic sound usually present in. warning signals embodying a diaphragm or a sound producing medium and a vibrating device coiiperating therewith to displace the diaphragm when agitated by high speed power by interposing between thcdiaphragm and the means directly engaged by the vibrating device a sound proof means which arevents the trai'ismission of the harsh metallic stridulaticn caused by the friction of the vibrating device when in action.

lVith these and other objects and advantages in view the invention consists in the construction and arrangement of the several parts which will be more fully hereinafter described and claimed.

In the drawing: Figure l is a sectional elevation of an acoustic apparatus or War ing signal embodying the features of the is a rear elevation of the motor boats and easing removed. Fig. etallsectional view particularly illustrating thernode of applying the sound .absorbing means or washer interposed between the diaphragm and the vib ating projection therefor. A Fig. 4 is a detail view illustrating fication. hls invention constitutes an improvement on that. disclosed in my application Serial No. 630,598, filed June 1, 1911-.

eferring to the drawing, the numeral designates a diaphragm or vibrating plate of the type usually employed in devices of this class and preferably secured toan cilset portion 6 of a rim I stituting a portion ot'the casing or inclosure for the apparatus and having a central enlarged open ng 9 surrounded by' a flange or lined collar 10 to which the end of a suit able resonator 11 is applied. At a suitable obvious arrangement in this art.

distance in raw of the diaphragm 5 a ilicnt arms 12 is secured, and as shown are four in number and diametrically intersecting at the a; iged, the said arms cc ner and connected 'to a suitable. disk 13. These arms 12, however, may be of any number, it only being necessary to have the arms free for movement or yielding action to relieve the diaphragm 5 strain in a manner which will bemore full hereinafter suitable form extends rearwardly from the disk or center 13 of the arms 12 and. be tween this projection and disk and the diaphragm 5 a washer 15 is interposed and secured by a suitable screw or analogous fastoning 16 passing through the diaphragm and the said washerand extending into the center or disk 13 so that the diapl'iragm, washer and disk are united.' The Washer 15 will be constructed of any suitable sound absorbing material, such as cork, and the object of the same is to prevent. the transof the vibrating device on the projection 14.

e rear section 17 of the casing, as shown, is provided with a rearcylindrical'extension 18 in which a suitable electric motor 19 is mounted and secured in any preferred mannor, the said motor having its armature shaft 20 projected forwardly and provided with'a rotary toothed disk or vibrating device 21 which is held in continual contact with the projection 14. While this is a preferred means of disposing themotor and the toothed disk 21, it will be understood that the same result may be attained by positioning' the motor at an angle and correspondingly changing the disk, which is an In the operation of the improved device .it will be understood that the motor is supplied with electrlc current from a suitable source of generation and the armature shaft 20 rapidly rotated to set upscorresponding rotary action of the dish 2t and the teeth of the latter being in contact with the pro jection 14 will result in a rapid displacement of the diaphragm. to generate alarm notes or sounds and owing to the supporting function of the resilient arms relatively to said projection, lateral pulling strain will not be imposed directly on-the diaphragm. The arms or l2 coact or harmonize with the vibrations of the diaphragn'i, with material advantage in the sounrl emitted by of direct pulling means for supporting the diaphragm, resilient means extending diametrically over a projection, a

the resonator, and wear and tear of the sound producing parts of the apparatus are and economy 1n the the diaphragm and having reduced to a minimum I use and operation of acoustic apparatus of i sound absorbing means interposed between 5 this class results. By the interposition of the resilient means and diaphragm, an

the sound absorbing means or washer l means engaging the )rojection to set up a between the diaphragm and the projection vibration of the diaphragm. 14 the harsh metallic rattling sounds or i i; In an acoustic apparatus of. the class stridulations will be eliminated and the specified, an inclosing casing having a reso- 19 tone of the signal given forth by the appanator, a diaphragm mounted. in the casing, ratus will be soft and pleasing to the car, resilient means extending diametrically over but at the same time sutliciently distinct-to j and supported adjacent to the diaphragm be eti'ective as an alarm. and having a projection near the center of While it is preferred to dispose the the diaphragm, a sound absorbing means 15 washer 15 in axial alinement with the prointerposed between the resilient means nd the diaphragm, and electric means crating the projection and resilient rm and the diaphragm.

. 5. In an acoustic apparatus oi the class specified, an inclosing means having a reso uator secured thereto, a diaphragm mounted in the inclosing means, a plurality of yielding bars mounted adjacent to the diaphragm, and having intersecting portions, a projection carried by the intersecting por' tions of the bars, a.soun d absorbing means interposed between the diaphragm and the said projection, and means for operating the projection-to set up a vibration of the diaphragm.

6. In an acoustic apparatus of the class ecified, an inclosing casing having a resoject-ion 14 and to connect the partsby the screw 16, as shown, it is to be understood that the improvement is by no means restricted to such an arrangement, and that. '20 the washer 15 may be located as desired, be-

tween the diaphragm sand an arm 12. It will also be understood that while the cruciform arrangement of the arms 12 is preferred, it is not obligatory, and the spring element which carries the projection 1 1- may be of any suitable construction. Thus, in Fig. 4;, I have illustrated a spring element 12" which is in the nature of a resilient straight hair arranged coincidentally with a diameter of the diaphragm and having the projection 14 at its center, in the manner described. In this case, however, the washer 15 is not locatedcoaxially with said prO- nator secured thereto, a diaphragm mountection, but 1s located at one side of the cened in the casing, a plurality of yielding bars ter of the bar, and as so arranged 1s well having intersecting association and carrying a projection adjacent to the center of the adapted to serve the purpose contemplated.

diaphragm, asound absorbing washer inter- The several parts of the apparatus are simple in their construction andmay be posed between and secured to'thediaphragm readily-associated, and changes in the proand the intersecting portions of the bars 40 portions, dimensions and minor details may and projection, an electric motor having a be adopted without departing from the projecting armature shaft, and a rotary spirit of the invention. toothed member secured directly on the armature shaft and engaging the projection to rapidly displace a portion of the diaphragm to produce a sound.

7. In an acoustic apparatus, of the class specified, a diaphragm, a spring element extending diametrically across the diaphragm and provided with a projection adjacent. to the center of the diaphragm, means arranged to engagevthe projection and thereby produce a vibratory action of the spring element and the diaphragm, and sound absorbing means interposed between the spring element and the diaphragm. 1

In testimony whereof I my" hand 'in presence ot two subscribing witnesses.

\Vhat is claimed 1s:

1. In an acoustic apparatus of the class specified, an inclosing casing, a resonator secured thereto, a diaphragm mounted in the casing, resilient means extending diametrically o er the diaphraglnand having a pro jection, a sound absorbing means interposed between the diaphragm and resilient means, and means engaging the projection to setup a vibration or the diaphragm.

2. In an acoustic apparatus of the class specified, a diaphragm having a supporting means, resilient means'extending diametrically over and close to the diaphragm and having a projection, a i sound absorbing means interposed between and secured to the diaphragm and the resilient means, and

G0 ERNEsT'R-UBES.

means engaging the projection to set up a j vibration of the diaphragm. 1 \Yitnesscs:

3. In an acoustic apparatus of the class i JOJIN F. CLEVELAND, specified, a sound producing diaphragm, i Isaac Brown. 

